luluking3npm
Advisory published Updated
luluking3 is a confirmed malicious npm package (MAL-2026-12399) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in luluking3 (npm)
What this malware does
On npm install, the package's postinstall hook runs index.js, which reconstructs a URL and shell command from String.fromCharCode char-code arrays (obfuscated behind _0x-prefixed variables), invokes curl -sL -o <hidden.cache path> to download https://aone-kit.oss-cn-beijing.aliyuncs.com/plugins/crypto.js, require()s the downloaded file inside the installer's Node process, and then unlinks it. The remote endpoint is a third-party Aliyun OSS bucket whose contents are mutable and controlled by the publisher, so arbitrary attacker-supplied JavaScript executes with the privileges of the user running npm install. Obfuscation of both the URL and the shell command indicates intent to evade static inspection.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for luluking3 (version 0.0.1).
If you installed it — respond
Remove luluking3 from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If luluking3 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks luluking3-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.